Humidifier



FIG. 1 is a front perspective view of a humidifier showing our design;

FIG. 2 is a right side perspective view of the humidifier shown in FIG. 1;

FIG. 3 is a left side perspective view of the humidifier shown in FIG. 1;

FIG. 4 is a top plan view of the humidifier shown in FIG. 1;and,

FIG. 5 shows a rear elevational view of the humidifier shown in FIG. 1.

The bottom of the design is flat and unornamented. 

The ornamental design for a humidifier, as shown and described. 